Improvement in fire-proof columns



UNITED STATES PATENT CEEICE.

WILLIAM H. DRAKE AND PETER B. WIGHT, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN FIRE-PROOF COLUMNS.

Specification forming part of Letters Patent No. 191,662, dated June 5, 1877; application led May Io, 1877.

" To all whom t may concern:

Beit known that we, WILLIAM H. DEAKE and PETER B. WIGET, of Chicago, in the county of Cook and State of Illinois, have in' vented a new and useful Improvement in Fire-Proof Columns, of which the following is a specification:

The object of the present invention is to improve the column patented to us, William H. Drake and Peter B. Wight, on September 8,1874., and numbered 154,852; and the nature of the invention consists in goresfastened to the webs ot' an iron core by means of buttons which are secured to the webs by screws or other suitable. means. The buttons are sunk beneath the surface of the gores and bear against shoulders formed a little distance vbelow the surface of the gores, and the buttons so sunk are covered with concrete or suitable Ere-proof substance, so that the iron is fully protected from the effect of lire 5' and further, in the sides of the countersunk parts being formed to slope inward as they approach thesurface ofthe gores, whereby the concrete is held firmly in place. By means of this construction the outside of the column may be disintegrated to considerable depth without permitting tire to come in contact with the iron. We also substitute wood for iron battens for covering the concrete in the countersunk interstices between the cores, as herein` after fully described and shown.

In' the drawings, Figure 1 is a horizontal section of a column constructed on our improved plan; Fig. 2, a vertical section on line :v ai, Fig. l.

A A A A represent a cruciform iron core or web, which forms 4the support for the Weight to be sustained. The core may, however, be constructed with three or more flanges, as the size of a column may require. The outer edges of the flanges are somewhat thinner than at the place of connection, but they may have a uniform thickness. The

gores are shown at C C C C, and are made of concrete or other suitable {ire-proof material. D represents shoulders formed on the gores, that buttons E may be placed on them to hold the gores to the web or core. The buttons are held against the webs by screws F tapped into their edges at suitable intervals to secure strength.

In practice, the gores may be molded the entire length of the iron core, or they may be molded in sections. In the latter case one button may be used to secure one corner of each ot'four sections.

The gores in the drawings are shown with inner angles at right angles, leaving spaces wedge shaped between them, to be filled by pouring in thin concrete. The countersunk spaces are to be filled with suitable concrete of any well-known kind to resist fire.

Gr represents wood battens, which serve no purpose except to hold the concrete I in place until dry.

The present device can be applied to iron columns now in use by attaching vertical ribs of iron to them by screws or tapping in studs, and then proceeding to fill in the gores in the same manner as though the said gores are described as applied to the iron webs, the buttous being also countersunk to the iron ribs or studs.

We claim as newl. The buttons, couutersunk below the surface ofthe concrete gores C, and having bearing on shoulders D, as and for the purpose set forth.

2. The inclined sided recesses J in a composition column for supporting the concrete I, as specified.

WILLIAM H. DEAKE. PETER B. WIGHT.

Y Witnesses:

G. L. GEAPIN, W. G. WILLIAMsoN. 

